Machine for producing interfolded paper-packages



S. WHEELER. @ACME FUR Ponucim INTERFOLDED PAPER PACKAGES.

APPLICATION FILED MAR. 6, i918.

Mmmm @0113, M9

i 3 SMEETS-SHEET 2.

S.-WHEELEQR. MACHINE FOR PRODUCINQ INTEBFOLDED PAPER PACKAGES,

APPJCM'ION FILED MAR. 6, 1918.

mm 00113. m

I3 SHEETS- SHEET 3. 4

' INVENTQR.

` www@ s. WMe-1MB. MACHINE FUR PRODUCINGNTERFOLDED PAPER PACKAGES.

APPLICATION FILED MAR. 6.1913. l

@mam-26a @am Ml, WRR.

13 lSHEETSWSFIEET 4.

s. wmzwm4 MACHINE FOR PHODUCING IN'S'ERFOLDED PAPER PACKAGES.

APPl.i(;ATlN FILED MAR. 6, `19115K.

s.'wI-IEELER. MACHINE FOR PRODUCING INTERFGLDED PAPER PACKAGES.

APPLICATION FILED III/III. s, 191s.

mma Im. II, ImmL 13 SHEETS-SHEET 6.

INVENTOR S. WHEELER. MACHINE'FOR PRODUCING INTERFOLDED PAPER PACKAGES.A

mem-fm @et u; my@

13 SHEETS-SHEET 7- Amm INVENTOR l ATTRNEYS SJWHEELER. MACHINE FORPRODUCING INTERFOLDED PAP EH PACKAGES.

APPLICATION LED MAR. 6, 1918.

Patented @im A19-'WZL I3 SHEETS-SHEET 8.

i ynuunummmnAMANA mwmimm. MACHINE FGW WUCING HNTNFLYED MHH ACKAGES.

APPUIZM'WN FILED MAH. 6. 1.9m. l

f @Umd @sa U19 'WZL 13 SHEETSl-SHEET 9.

WWENTQR v WHEELER. MACE-HNE FOR PRODUCING IWTERFOLDED @PAPER PACKAGES.APPucArlow man man. s. 191s.

Pmmnmd @am M, Wma

` 13 snsnssnr 10.

` INVENTGR ATTORNEYS APPLICATIN FILED EMR. 6. HHH.

INVEN'H'OR S. WHEELER.

MACHINE FOR PRODUCING INTERFOLDED PAPER PACKAGES. A

APPLICATION HLEDMAR. s. 19e.

I3 SHEETS-SHEET E2.

l S. WHEELER. MACHINE FOR PRODUCING INTERFOLDED PAPER PACKAGES.

APPllcATmN man MAR. 6. 191s. v v Lglm Patented @en M, mh l 4 y l `1sSHVEETSHEETI@ The object of my ject of invention make; Fig. 2 is a planview of a blank adapted blank comprises on the line 11-11 of Fig.

ssrn WHEELER, or casfrnnroir, new roaml MACHINE ron montrerai@ iiaaaiia.

Specification of Letters Patent.

NTERFOLDED PAPER-PACKAGES.

Fatented Uct. 11, 1921..

4Application filed' March 6, 1918. erial No. 220,759.

To all whom t may concern:

Be it known that 1,' SETH WHEELER, of Castleton, in the county ofRensselaer, and

in the State of New York, have invented a 5 certain new andusefullmprovement in Ma# chines for Producing lnterfolded Paper-Packages; and l d hereby declare that the following is a tion thereof.

inventionhas been to .provide a machine which shall be capable ofcheaply and rapidly forming interfol-ded paper packages, and to suchends my in` vention consists in the machine for orm- .15 ingl paperpackages vhereinafter specified. y

ln the drawings- Figure 1Jis a vertical, longitudinal, sec-- tionalviewof a dispensing cabinet containing a package of paper, such as it isthe obto be operated on by the machine and practising theprocess laterdescribed,when the three double leaves;

Fig. 3 is a side elevationof the blank of Fig. 2 folded;

Fig. 4 is a perspective view of an interfolded package such as made bythe machine 30 and process described herein from the blank of Fig. 2,the package being uncollapsed;

Fig. 5 is a view similar to Fig. 4, in which the units are interfoldedin a different man'- ner from Fig, 4t;

Fig. 6 is a side elevation of a blank similar to that inl Figs. 2 and 3,but having only i two double leaves;

Figi-7 is `a side elevation of two of the l blanks of Fig. 6 interfoldedin the manner lip shown in Fig. 4. to form a package;

Fi 8 is a side elevation of a machine em bodying my invention andadapted to practise the process which forms a part thereof; Fig. 9 is afront elevation looking inthe .345 direction of the arrows of Fig. 8;

" .1.. Fig. 1() is an enlarged, fragmentary view,

with parts in section, 'of the elements shown in Fig. 8 foroperating thefolder blades; Fig. 11 is an enlarged detail section taken Fig. 12 is asection taken on the line ia-ia of Figfii;

Fig. 13 is aQfragnientary detail View of the cutting roller;

' operative parts;

fullfclear, and exact descrip-;

this application to f scale, taken on the line 22-22 of Fig. 21;

Fig. 23is a fragmentary plan view with e fore, whilel shall Fig'. 14 isa plan view the tiicker blade andvoperating parts therefor; x Fig. lo isan enlarged fragmentary detail in elevation, showing a wiperI blade andits Fig. 16 is a fragmentary cross-section l taken on the line 1(3--16of Fig. 15;

Fig 17 is a perspective view of a portion of the detail with hooks andeyes A mounted thereon;

Fig. 18 isa fragmentary plan view on an enlarged scale, showing thegripper fingers and means for operating the same;

Fi 19 is an enlarged section taken on `the line 19-19 of Fig. 18;

Fig. 204 is a perspective view, of one of the hooks shown in Figs. 18and 19;

Fig. 21 is a view similar to-Fig. '19, showv ingjhe parts in a differentposition;

ig. 22 is a cross-section on an enlarged parts removed and parts insection, showing the tapes o r belts and adjacent parts, and showing thearms or bails 50 and parts for operating the same;

Fig. 24 is a section 24.424 er Fig. 23;

Figs. 25 and 26 taken on the 'line are fragmentary eleva- Jtions of thefolder blades and mechanism said figures respectively l for operatingthem, y showing the parts in different relations;

i Fig. 27 is a section taken on the line 27-27 of Fig. 26;

Fig. 28 is an enlarged view, artly in section, of the tncker blades andt e immediate parts carrying and operating them; 4

Fig. 29 is a cross-section taken on the line 29-29 of Fig. 28; 4

Fig. 30` is a section taken von the line 30-30 of Fig. 31,' and showingthe locking bar and other operating parts;

Fig. 31 is a fragmentary section partly in section taken on the line31-31 of Fig. 30; I

Fig. 32 is an enlarged view of a portion of the folding cylinders,creasers and co-acting grooves; and,

Figs. 33 and 34 are fragmentary views of parte in section of thefollower, Fig. 34 also showing the chiite'and cooperating parts.

showing the My invention is capable of embodiment in many differentforms'of machine, and thereillustrate themachine by particular formsillustrated, ly interpreted. the drawings, the preferred he object ofhine to produce, is one ich, as shown in Fig. 1, is especially adaptedto be delivered from a receptacle the contents as a whole obtain onlyone kage l shall always units with a doubled or double edgefor the userto take hold of, so that the user is less likely to tear the unit inwith` rawing it from the receptacle, hands are wet; that such doubledpreferably always project in the rection from the ea inet, and thatshall be so engaged with each other that the Withdrawal of the lowermostunit shall with certainty cause the doubled or double edge of the next lto project from the cabl unit shall consist 'of two sheets fastenedtogether instead of two separated sheets, either of which might bedropped to the tioor without the other, and shall use of a recephaving aslight depth horizontally relaheets of which the In ig. l I have shown averticahsectional View of a metal receptacle or cabinet [containing sucha package of ave described, and so arranged that 1t can be locked tolowermost unit of the package. net l has a door 2 which is opened toinsert a package l3 within the cabinet, and is then most unit of thepaper package projects through a slot 5 in the bottom of the recep- -ace in position for the user to take hold of rit. The package is so madethat the 'withdrawal of this unit shall cause the corresponding doublededge of the next lower- Inost unit to project in the same manner so thatthe units ot' the package are brought after another, until the The blankfrom the preferred form of unit is made is of'a sheet 6 iavinglpreferably a central transverse fold and parallel folds 8. 8, 9 and 9on opposite sides of and parallel to the central old 7. The blank isfolded ou the line T, thus forming the doubled edge 4, and the folds iand 8" arc both made in one direction. and the folds 9 and 9 are made inthe opposite direction. '.lhe blank thus consists ot' the doubled edge4. connecting leaves l0 and 10a.'intermediate leaves ll and l1, and whatmay be termed .free leaves i2 and 12.

l' preferably interlock the units, as shown in 1`ig. 4t, to forni astack, or pile, or package, by locating the doubled edge 4 ot' cach unitbetween the free leaves or terminals 1:2 and l2 of the next lowermost.unit. This doubled edge 4 may, however, underlie both ol' the freeleaves l2 and l2, as shown in Fig. 5.

package having the units of the form shown in Figs. 4 and 5 is insertedin the case with the doubled edge 4 unit projecting through being'fastened to the wall so that this doubled edge projects away lvhenvtheuser wishes a unit, he engages the doubled edge and pulls downward. "hisnot only releases the lowermost unit, but draws the doubled edge of theunit above it through the slot so that it projects forward, as did thedoubled edge just engaged by the user.

The unit made as shown in Figs. 6 and 7,

consists of but four leaves, 13. 13", 14 and 4t, instead of six, as dothe units before described, the doubled edge l5 of each unit beinglocated between the leaves 14 and 14 of the preceding unit. `his form ofpackage. however, causes the doubled edges to project alternately inopposite directions, and is therefore less convenient to use than theform before described.

"he particular machine which l have illust-rated is adapted for makingthe .package shown in Figs. l, 2,' 3 and 4.. The said machine comprisesframes 1G carrying arms 1T that. are adapted to supportI the arbor 1S ofa roll of paper 19 from which the units are to be made. A web 2U. fromthe roll of paper 19, is led preferably under a roll Q1, and betweendividers E22 and a bed roller 23. lhc web of paper is preferably wideenough to make a series of units side by side. and the dividers 22 arcfor the purpose ofdividing the web on longitudinal lines between theproposed units. `he cutting edges of the dividers are preferablyinterrupted at intervals so as to leave little uncut portions oristhmuscs connecting the strips oi' units to keep the transverse. rowsof units in line with each other and to prevent some of them gettingahead of ot "he roll Q1 is shown as mount-ed in bearings fixed on theframe, and theI dividers 252 arc shown as mounted in arms Q4 that arepivoted at 25 upon brackets carried by arrangement and a mashing roll2T, operates after the manner of .ilock with a knife 28 on the cuttingcylin` der. The knife is shown as being made of rather thin metal andheld in place by a chopping lil screws 28a bearing upon a plate 281 thatrests upon the lrnife` The meshing roll 27 has a groove 27a having anedge 27" that is adapted to coperate -with the knife 2S, the groovebeing deep enough to accommodate the knife. The rolls 21 and 221preferably have a uniform rate of ro tation, bult l desire to cause the`cutter to travel at a higher rate of speed than eration, so that itwill not only cut the paper, but also move the cut sheet forward andseparate it from the web. 1n cutting very thin paper, the paper, havinglittle, stiffness, has a tendency to go with the cutter and fold aboutit rather than to stand still and be sheared, and hns an ordinary cutterwill often not lcompletely sever the sheet. rllhe cutting action such asl have described, however, separates the 'unseve'red portions verysuccessfully. In the present instance., 1 secure such driving thecutting cylinder 26 from the shaft of the roll 23Aby eccentric gears 29and 80, respectivel lhe mashing roll, 1s preferably driven from 1 'and82, is consequently en the cutting cylinder by ordinary concentricgearing. The eccentric gears are so mounted that the period ofaccelerated speed of the cutter cylinder occurs while the cutter is inaction on the'web of paper.

The cutter, of course, does not act until a length of the paper 'web 20has been `fed past the cutter suiiiciently to form a unit. I'llhe web,therefore, passes freely between `the cutter cylinder 26 and the roll27, these elements being su'lii'ciently spaced apart for that purpose,and. passes between rolls 31 and 32. A vseries of belts or tapes 33passes over the upper roller 31 in grooves in the roller, the other endsof the tapes or belts passing over rollers 34. These belts or tapes areprovided with hooks 35 which project in aforward direction when on thelower lap of the belt Grooves or recesses are formed .in the lower roll82 to -permit the hooks to pass between the rollers. The web jef paper,in passing between the rolls 31 gaged .by hooks 35, 'the said hooksbeing so spaced upon the tapes, and timed by engagement of pins 86 Aenthe upper roller engaging with eyelets 37 on the tapes, that they takehold of the web near its forward end and also in the back portion of theunit'severed or to be Severed, the unit thus being suspended on theunder side of thetapes. .The tapes are fed forward continuously.V

rihe unit, severed or to be severed, is carried on by the hooks on thetapes until its forward end stops between upper and lower i rpergrippers 88 and 39, respectively. 'The gripper 88 is iinedly mounted ona ver- A movabl 40,and the lower gripwm. i? hinged to the said carrier.spring mounted on their axes.l

the web of paper during the cutting op,A

a cutting actionV by f 41 bears against the curved under portion of thelower gripper, and normally tends to hold said gripper pressed againstthe under side of the upper gripper. A pin 42 lies on the upper side ofthe curved portionof the lower gri per, there being one pin for each oftwo a jacent pairs of grippers, .the pin having collars 42 thereon toengage with the sides of the grippers and prevent lateral displacementdf the pin. A hook 43 is secured to a fixed part of the frame betweenthe pairs of grippers, and a shoulder 44 is likewise secured to the saidfixed part some. distance below the hook. The carrier is raised andlowered by the action of a lever 45 fulcrum'ed at 46 on the frame, thelever carrying a -roller 47 that rests upon a cam 48. A link `49is-pivoted to the lever and supports the carrier 40, the arrangementbeing duplicated at both ends of the carrier 40. When the grippers arebeing raised to their highest position, the pin 42 .is engaged by thehook 43, and the said pin, being prevented from rising, acts so that itis separated Ifrom the upper gr1pper, and this is the position while therollerv 47 is traveling over a dwell 48a on the earn. At this time,thehooks. on the tapes feed the end of the unit being severed betweenthe grippers. The roller 47, passing off of the dwell 48, rides down thecam and lowersv the carrier 40 and gripper, drawing the pin 42 away fromthe hook 43. The pin 42 strikes upon the ledge A44 and being preventedfrom goinglower the under gripper 39 passes out from engagement with thepin and its-spring 41 throws said gripper upward causing it to rip thepaper against the under side of tide upper gripper; As the gripperscontinue their descent, they pull the paper down and release it lfromthe adjacent hooks 33a. At the same time, the paper is released from therear hooks by an arm or bail 50 that is mounted on a shaft 51, saidshaft being oscillated by a rod 52 that is ivoted to a crank 53 mountedwith the sha t, the rod 52 being reciprocated longitudinally by theaction of a cam 54 on a4 roller 55 carried on the end of the said rod.

A spring 56-on the shaft 51 tends to throw the arm 50 down and toholdthe roller 55 against the cam. l f

j Beneath the tapes 38 are a pair of cylinders 57 and 58 which areprovided with reasers 59, there being a coperating groove 0 in theopposing cylinder for each creaser.

'lhese cylinders are provided with air holes 6l in their surfaces andpipes 62 communi-V cate with the. interior of the cylinders through thejournals, said pipesbeing connected with any convenient suctionapparatus. The journals and cylinders are cut out so that the cylindersrotating 4on the journals only permit connnunimition between theinterior ot' the cylinders and the suction pipes in certain phases otrotation of the cylinders. This suction is tor the purpose of holdingthe ends. fr free leaves 12 and l2a olf the units tothc surfaces ot' thecylindersnntil the doubled edge ot' the next succeeding' unit isinserted between them, as later described. A tut-ker blade (S23 ismounted in any desired way to make the middle told 7 ot the unit bythrusting the blade against the unit 'trom above and toldim..r itbetween the two cylinder,` 5T and In the present instance. the tuckerblade is mounted on arms G4- that are secured to a shaft 64 carrying acrank 65. which crank is connected by a link (36 'ith a bar (ST. saidba-r having a slot in its forward end which slides on a fixed pin (i8,and being operated at its rear e dvby a cam G9, the reciprocation ot thebar causing the link (iti to reciprocate the crank (S5, and tl..` Leoscillate the. arm (tt and raise and lowe.l the tucker blade. 'A spring64b onthe crank shaft Atends to throw the tucker blade down when the camwill permit it.

he grippers hold the t'orward end ot' the blank unit so that the tuckerstrikes the unit at a definite distance troni its lforward end. theslack all coming from the rear end ot the unit or that end toward thecutter. and thus the middle fold 7 is formed in exactly the desiredplace. llt the slack carne trom both ends. it could never be told withcertainty how the slack would be divided. and consequently where thetold would be made, The tucker blade being mounted as it is. not onlyhas an up-and-down movement, but has a componentin the` direction tromthe grippers toward the center ot the unit, This component ot' thetucker blades motion tends yto take out any slack between the grippersand the center Eot' the unit, and to insu-re that all the slack shallcome troni the other. end of the unit. The downward movement ot thegrippers and ot' the linger 5() carries the paper down against thesurface of the cylinders 5T andoS. so that the 4suction can take hold ofthe paper.

n order to keep the rear edge ot the sheet inclose contact with the rearcreasing cylinder 5S. I provide lingers. 69a mounted on a shaft 69", thelatter carrying a crank (392 the fingers being preferably provided withrubber or other friction pads (59d. The shaft is` oscillated byengagement oi a cam 69 with a roller GSV on a lever (S9-f. which latteris connected with the crank G9 by a link G9, a spring 6W tending toretract the lingers from the cylinder and to hold the roller V againstthe cam.

`he unit carrimldown by the er blade is caught between the cvlinders 5Tandl. and the folds or creases and t) are made 1,393,415 BEST'VILBLECOPY in opposite sides of the unit by the creases 5S) cooperating withthe grooves (5t). .\s the unit descends. the suction is `"admitted" (soto speak) to the interior ot they cylinders. and the tree leaves 12 andl2" ot the unit are "sucked" against the surfaces ol" the cylindersholding them apart. a new unit being` meanwhile brought into positionand tucked between the said tree leaves as they are closed together bythe action ol' the cylinders.

.l desire to provide means to fold the into the zig-zag shape shownwhich the folds S and il will be |'nojccted in opposite directions. andto collapse the continuousl chain ot' units into a package in thecondition ,shown in Fig. l. Such means. in the present instance.consists of folder blades T() and 71 which project horizontally 'tromopposite directions, llach blade is mounted on a slide Tr! that isvertically mov\ able on a base T3. the latter being formed on. orattached to. a horizontally movable slide T-l. )leans for reciprm'atingthe slides Tl are shown in the present instance as consisting o'l a rackT5 carried by the said slide. which rack is engaged by a pinion TG thatrolls on a stationary rack Ti'. 'l`he pinions To carry links TH whichare pivotcd together and to a link T5). the said lilik being pivoted toone arm ot a lever RU whose opposite arm is connected by a link Hl witha crank pin H2. This mechanism causes the link 75l to rise and tall. andto sprcad apart thc links TH like a toggle Iioint. causing the pinionsto travel on the stationary racks and thus to Ytorce the racks Tf1 backand l'orth on the horizontally movable slides Tl. and to lgive-horizontal movement to the folder blades Tti and Tl.

l desire to draw lhc tolder blades back alternately and to lock the onenot tobe drawn back 'from horizontal movement. For that purpose lprovide vertically movable bolts H3 that have rack teeth vformedthereon. which teeth engage pinions S4- mounlcd on fixed Iiourrals.'l`he pinions Qlare secured to pinions S5 that engage horizontal rackteeth Ht? carried by, a bar ST. said bar carry` ing' anti-frictionrollers HS that engage the opposite edges ot a cam SS). The said camreciprocatesthe bar 8T. causing the pinions H4 to rotate. and thesepinions throw the bolts Sil up and down alternately. the bolt beingthrown up which corresponds with the folder blade which it is desired tohold stationary. rl`hc holding ot one of the, folder blades stationary.say. the right-hand one. as seen in Fig. QG. prevents movement ot itsslide Tft and consequently of its rack 75. and thusl its` pinion To isheld from moyement. and all the. motion due ening ot the toggle jointformed by thetwo links 78. is given to the opposite pinionf units inlhg. l. in

to the straighti inseam m (the left-hand one, inthe supposed example),and the left-hand older blade is thus Withdrawn.

l desire to give the folder blades a vertical, as well as fa horizontalmovement, and .for that purpose the vertically movable slides 72 carryanti-friction rolls 90 which engage slots 91 in Lshape plates 92. Theseplates have slotsf92a which engage pins 93 on the frame, and the upperends f the said plates 92 arepivoted to levers 94 that are fulcrumed on'a stationary pin 95, the levers having anti-friction rolls 96 that,Ir'est upon cams 97,y The scams 97 are so shaped, and

V the mechanism 4for moving the folder blades horizontally and forlocking them, is so proportioned that, as shown in Fig. 10, forinstance, the folder blade 70 is first'v thrown forward to fold theleaves 10El and 11 against each other, and to form the folds 8--8ZL andthenthe folder blade 71 is thrown toward the unit to form the folds9-9", and to bring the leaves'll and 12 toward each other. The folderblades not only form the folds described, but pressv downward on theleaves underneath them, each one alternately holding the stack of unitsbeneath it in a compressed condition, While the [other folder blade liswithdrawn from beneath that one whicliis holding;` the sta-ck, and isthen thrust fonward above it to perform its' operation, and in itsv turnto hold the said stack down while the first mentioned folder bl aderepeats its operation. The motion of the folder blades is like that ofchildrens hands when they play a game in which one child,- places itshands upon the tab'le and another childslaps its hand upon that of thechild who first played,pndthen the childwho first 40 played withdraws"fliis hand from-beneath and places his upon the top again, and so on.The stack of collapsed units is compressed into a rece tacle which, inthe present instance, is s own as a chute 98. When the `machine is lirststarted, it is desirable to provide some form of resistance for thestack of collapsed interleaved units in the chute until the chute hasbeen Ifilled or is sufiiciently filled so that the friction ot the stackon the sides of the chute will afford such resistance. l haveaccordingly provided a follower 99 which carries an arm 100 that isprovided with a split bearingl 101, and this arm 100 is frictionally engaged upon a shaft 102 of a pinion 103, by

drawing the split bearing together by means of a., bolt 104 and? thumbnut 105. The

ypinion engages a rack 106 on the chute so that the follower can onlyslide down the chute by the travel of the pinion along the rack, andthis travel is resisted by the friction of the shaft 102 in the arm 100.

In describing the illustrated embodiment of my invention, l havedescribed the operation ofthe mechanism as l have dee5 scribed thesuccessive parts of themechan nism. y lit is therefore not Vnecessaryatodescribe the operation in detail. The general operation ot the machinemay thus be briefly stated. 'f The web of paper 20 on the roll 19 70passes' through the cutting and dividing;r mechanism, and is out intorows of units, veach row, as it passes between the cylinders 31 and 32,being impaled upon the hooks 35 on the belts 33, and` being carried onthe under side of the said belts to a position over ithefoldingcylinders r57 and 58. ln thisr posit-ion, the front edge of the units isbetween the ,fpairs ot grippers 38 and 39. The kgrippers engagetheifront edgeand descend, and at the same time.' the arm 50 descends,and thus the unit is released from the hooks and brought down `intocontact with the surfaces yf the cylinders'iand within reach ,of thesucblade 63 descends, tuclring the unit between the cyli ders, andtaking all the slack from the right hand end, as seen in Fig. 11, sincethe grippers hold their edge of the unit with a gripy which, thoughyielding when the cylinders have? gotten a grip on the doubled edge ,ofthefunit, is positive as compared to A any resistance/.on the right handend oit',v the unit. Thusfitcan 'be told with certainty where toposition the grippers so that the unit will be` centrally folded. Thesuction holds the free vedges or leaves` of the unitv against thecylinders, so that they are open when a succeeding unit is formed, andready to receive the doubled edge of such succeeding unit, the unitsthus, in effect, forming a web., The units are creased parallel to thedoubled edge by the blades 59, coperating with the grooves 60, so thatthey assume a more or less zig-zag; form as they pass IfrorniO betweenthe cylinders. lhe folders 70 and 71 are alternately thrust into theV-shape' recesses of the paper formed by the creases, and press down onthe leaf or told under i neath and ,hold it down while the other folderis thrtxst in above the told immediately over the Hriit mentioned folderand pressed down. Aften the second mentioned folder has gottena stack ofcollapsed web or units under its control, the first mentioned 'folder11'5 is drawn hack, raised and` again thrust torward to engage anothersection of tlie'weh. The stack of collapsed units thus accumulates inthe chute, and the follower which is inserted when the machine is emptyis gradnally forced down to the end ot the chute and taken out, thefriction of the walls of the chute thereafter affording sufficientresistance to the downward movementr of the folded units. y I

l claimt` 1. 'ln a machine of the class described, the combination otmeans for folding successive ion -from within them, The tuclrer 85 44sheets or units, and means for so holding each sheet or unit thatthee'dge of the succeeding unit shall be placed between and in contactwith the free edges or leaves of the first mentioned unit.

2, In a machine of the class described, the combination of means forsuccessively severing sheets or units from a' strip, means forsuccessively folding said units, and means for holding eachunit so thatthe doubled edge of the succeeding unit shall be placed between and incontact with the free leaves or edges of said first mentionedunit.

3. In a machine ofl the class described, the combination of means forsuccessively severing sheets or units from a strip, means forsuccessively folding said units, means for holding each unit so that thedoubled edge of the succeeding unit shall be placed between the freeleaves or edges of said first mentioned unit and means for scoring orcreasing each unit parallel to its doubled edge.

el. In a machine of the class described, the combination of means forsuccessively scf:- ering sheets or units from a strip, means forsuccessively folding said units, means for holding each unit so that thedoubled edge of the succeeding unit shall be placed between .the freeleaves or edges of said lirst mentioned unit, and means for scoring orcreasing each unit parallel to its doubled edge' with a plurality ofoppositely facing scores or creases.

5. In a machine of the class described, the combina-tion of means forsuccessively scvering sheets or units from a strip, means forsuccessively folding said units, means for holding each unit so that thedoubled edge of the succeedillg unit shall be placed between tbe freeleaves or edges of said lirst mentioned unit, means for scoring orcreasing each unit parallel to its doubled edge with a plurality ofoppositely facing scores or creases, and means for collapsingthe trainof units to form a package.

6. In a machine of the class described, theI combination of means forsuccessively severing sheets or units from a strip, means forsuccessively folding said units, means for holding each unit so that thedoubled edge o f the succeeding unit shall be placed between the freeleaves or edges of said first mentioned unit, means for scoring orcreasing each unit parallel to its doubled edge with a plurality ofoppositely facing scores or creases, and means for collapsing the trainof units to form a package, said means,` engaging the scores or creasesand forcing them in opposite directions relative to the plane of thesheet or unit. i

7. In a machine of the class described, the combination of a pair ofparallel cylinders Whose adjacent surfaces are close to each other,means for feeding a sheet or uni* over the space between said cylinders,means for doubling and forcing said unit between said cylinders, andmeans for grasping one edge" of said sheet or unit while the latter isbeing tucked between said cylinders.

8. ln a machine of the class described, the combination of a pair ofparallel cylinders whose. adjacent surfaces are close to each other,means for feeding a sheet or unit over the space between said cylindeis,means for doubling and forcing said unit-between said cylinders, andlneans for yieldingly grasping one edge of said sheet. or unit while thelatter is being tucked between said cylinders.

9. ln a machine of the class described, the combination of a pair ofparallel cylinders whose adjacent surfaces are close to cach other,means for feeding a sheet or unit over thc space between said cylinders,means for doubling and forcing Said unit between said cylinders, meansfor holding one edge of said sheet or. unit while the latter is beingtucked bctwccn said cylinders, and means for causing the free edges orleaves of a sheetor unit to lic upon the surfaces of said cylinders.

l0. ln a machine of the class described, the combination of a pair ofparallel cylinders whose adjacent surfaces arc close to ach other, meansfor feeding a sheet or unit over the space bctwecn said cylinders, meansfor doubling and forcing said unit between said cylinders, means foryieldinfrly holding one edge of said sheet or unit while the latter isbeing tucked between said cylinders, and means for causing the frccedges or leaves of a sheet or unit to lie upon the surfaces of saidcylinders.

l1. In a machine of the class described, the combination of a pair ofparallel cylinders whose adjacent surfaces are close to cach other,means for feeding a sheet or unit overtbc space between said cylinders,means for doubling and forcing said unit between said cylinders, meansfor holding one edge of said sheet or unitwhile the latter is beingtucked between said cylinders, aml pneumatie means for causing the f'reeedges or leaves of a sheet or unit to lie upon the surfaces of saidcylinders.

12. In a machine of the class described, the combination of a pair ofparallel cylinders whose adjacent surfaces are close to each other,means for feeding a sheet or unit over thespace between said cylinders,means for doubling and forcing said unit between said cylinders. meansfor yieldingly holding one edge of said sheet or unit while thc latteris heilig tucked between said cylinders, and pneumatic means for causingthe free edges or leaves of a sheet or unit to lie upon the surfaces ofsaid cylinders.

13. In a machine of the class described, thc combination of a pair ofparallel cylinnio '-ie'ach other, means for feeding a sheet or unit overthe space between said cylinders, means for doubling and forcing saidunit between said cylinders, means for holding one edge of said sheet orunit while the latter is being tucked between said cylinders, randpneumatic means acting by suction for causing the free edges or leavesof' a sheet or unit to lie upon the surfaces of said cylinders.

14. In'a .machine of the class described, the combination -ofa pair ofparallel cylinders whose adjacent surfaces are close to each other,means for feeding a sheet or' unit over the space between saidcylinders, means j for doubling and forcing said unit between saidcylinders, means for yieldingly holding ne edge of said sheet or unitwhile the latter isbeing tucked between said cylinders, `and pneumaticmeans acting by suction for causing the free edges or leaves ofv asheet`or unit to lie upon the surfaces ofl the combination of a pair ofparallel cylinvders whose adjacent surfaces are close to. each other,means for tucking successive units between saidcylinders, means for.

holding the free leaves or edges of each unit open until the doublededge of the succeeding unit shall have been placed between thefreeleaves or edges of the unit rst mentioned, and means for creasingeach unit parallel to its doubled edge.

17. In a machine of the class described, the combination of a pair ofparallel cylinders whose .adjacent surfaces are close to each other,means for tucking successive units between said cylinders, means forholding the free leaves or edges of each unit open until the doublededge of the succeeding unit shall have been placed between Y the freeleaves or edges of the unit first mentioned, andmcans for creasing eachunit parallel to its doubled edge, there being a 'plurality of creasesformed in each unit parallel to its opposite edge.

18'. lua machine of the classI described, the combination of a pair ofparallel cylindcrsywhose adjacent surfaces are close to cach i other,.means `for tucking successive units between said cylinders, means forholding the free leaves or edges of each unit open until the doublededge of the succeeding unit shall have been placed between thefreeinname leaves or edges of the unit irst mentioned, and means forcreasing each unit parallel to its doubledledge, there being a pluralityof oppositely directed creases formed in each unit parallel toitsopposite edge.

19.'.ln a machine of the class described, the-'combination of a pair ofparallel cylinders'v whose adjacent surfaces are close to eacli` other,means vfor tucking successive units between said cylinders', means forholding the free leaves orv edges of each unit open until the doublededge of 'the succeeding unit shall have been placed between the freeleaves or edges of the unit first mentioned, means for creasing eachunit parallel to its doubled edge, there being a. plurality ofcreasesformed in each unit parallel to its opposite edge, and means toengage said creases to collapse the unitsto form a package.-

20. In a machine of the class described, the combinationof a pair ofparallel cylinders whose adjacent surfaces are close to each other,means for tucking successive unitsbetween said cylinders, means forholding the free-leales Vpor, edges of each unit open until the doublededge of thefsucce'eding unit shall have been placed between the freeleaves or edges of the unit first mentioned, me'ans for creasing eachnuit parallel to its doubled edge, there being a plurality of oppositelydirected creases formed in each unit parallel to its opposite edge, and

jmeans to engage said creases to collapse the units to form a package.

`. 21. In a machine of the class described,

the combination f two parallel cylinders,

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means for feeding a sheet or unit over the space between said cylinders,means for succcssivelv tucking the units into said space,

means for holding the free leaves or edges of each unit open until thedoubled edge of thesucceeding unit shall have been tucked therebetween,and a blade on one of said `cylinders adapted to form a' crease in a.unit parallel to its doubled edge. y

22. In a' machine of the class described, the combination oftwo'parallel cylinders, means for feeding a sheet or unit over the spacebetween said cylinders, means for successively tucking the units intdsaid space, means for holding the free leaves or edges of each unit openuntil the doubled edge of the succeedingr unit shall have been tuckedtherebctween,and a plurality of blades on said cylinders adapted to formcreases in said units parallel to their doubled edges,

the blades being alternately mounted upon opposite cylinders.

23. In a machine of the class described, the combination of two parallelcylinders, means for feeding a sheet orvunit over the space between saidcylinders, means for suc1 cessively tuclring the units into said space,means for holding the free leaves or edges

